The following information obtained from UNAVCO's online DOI system: (https://www.unavco.org/data/doi/search/search.html) PBO GPS Network - P577-CdrSpgDam_CS2004 P.S. Start: 16-Dec-2004 End: 14-Nov-2022 UNAVCO Community, 2005, PBO GPS Network - P577-CdrSpgDam_CS2004 P.S., UNAVCO, GPS/GNSS Observations Dataset, https://doi.org/10.7283/T5M61H59